亚硝基转移作用

一杯好茶 A Nice Cup of Tea

If you look up 'tea' in the first cookery book that comes to hand you will probably find that it is unmentioned; or at most you will find a few lines of sketchy instructions which give no ruling on several of the most important points. This is curiou

发表于:2018-11-29 / 阅读(411) / 评论(0)

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大学英语四级词汇 r

rabbit n.兔子 race n.民族；比赛 vi.全速前进 vt.和…比速度 racial a.种族的，人种的 rack n.架，行李架 radar n.雷达 radiation n.辐射(线/能) radical a.激进的；彻底的

发表于:2018-12-15 / 阅读(319) / 评论(0)

大学英语四级词汇

温馨夜读 PART3 02 The Last Letters 最后的家书

[ti:] [ar:] [al:] [by:] [00:00.47] The Last Letters 最后的家书 [00:05.72]To son, Cecil, [00:09.22]Just a quick note preface before I start in earnest. [00:13.37]When I wrote this you were 8, still a little boy. [00:17.75]A few years ago, [00:19.

发表于:2018-12-26 / 阅读(334) / 评论(0)

温馨夜读

11 Nations Sign Trans-Pacific Trade Deal Without US

Eleven countries in the Pacific region have signed a major Asia-Pacific free trade agreement in Santiago, Chile. The deal is a new version of the Trans-Pacific Partnership from which the U.S. withdrew last year. The agreement is called the Comprehens

发表于:2019-01-03 / 阅读(458) / 评论(0)

2018年VOA慢速英语(三)月

WHO Wants to Remove Trans Fats from Food

From VOA Learning English, this is the Health Lifestyle report. There may be something in your food that you cannot see and cannot taste. But it could be killing you. It is an artificial oil commonly called trans fat. Trans fat is a toxic chemical th

发表于:2019-01-03 / 阅读(384) / 评论(0)

2018年VOA慢速英语(五)月

英语四级同形异义词辨析06

英语四级同形异义词辨析06 1. The work was almost complete when we received orders to no further with it. (2003.06) A) progress B) proceed C) march D) promote 2. It was the first time that such a had to be taken at a British nuclear power st

发表于:2019-01-03 / 阅读(376) / 评论(0)

四六级词汇与结构练习

麻省理工学院公开课：单变量微积分03：求导四则运算及三角函数导数

分集介绍：导数，商数，正弦和余弦 Derivatives.of.products.quotients.sine.cosine

发表于:2019-01-05 / 阅读(543) / 评论(0)

麻省理工学院公开课：单变量微积分

麻省理工学院公开课：单变量微积分01：导数和变化率

分集介绍：导数，斜率，速度与变化率 Derivatives.slope.velocity.rate.of.change

发表于:2019-01-05 / 阅读(601) / 评论(0)

麻省理工学院公开课：单变量微积分

英语游戏:愚蠢的香肠

[全屏观看] 点击右键- 另存为可保存这个Flash影片 Silly Sausage是Nitrome于2011年5月28日发行的一款益智类游戏，它是以香肠在尽量不碰到其它损失生命物体的情况下吃光所有的钻石再到达终点为标

发表于:2019-01-08 / 阅读(415) / 评论(0)

英语对接游戏

US Military Shapes What Americans Eat

US Military Shapes What Americans Eat Much of the food Americans buy at the store has a secret military history. People in the United States eat more processed foods than those in other countries. Now, an American writer says many foods like energy b

发表于:2019-01-12 / 阅读(341) / 评论(0)

2015年VOA慢速英语(十)月

HEALTH REPORT - New Heart Drug Shows Promise in African Amer

HEALTH REPORT - New Heart Drug Shows Promise in African Americans By Cynthia Kirk Broadcast: Wednesday, November 17, 2004 This is Bob Doughty with the VOA Special English Health Report. Heart failure

发表于:2019-01-30 / 阅读(333) / 评论(0)

健康与经济

Step by Step 3000 第1册 Unit7:Transporation(1)

Unit 7. Transportation. Part 1. Warming up. A. Keywords. weather, around the world. Vocabulary. Amsterdam, Bogota, Dublin, Istanbul, Warsaw. You are going to hear the weather forecast for some cities around the world. Supply the missing information i

发表于:2019-02-03 / 阅读(232) / 评论(0)

step by step 3000 第一册

Step by Step 3000 第1册 Unit7:Transporation(4)

Part 4. Asia's cities face gridlock. Keywords. Asia's cities, gridlock, mass transit systems, car sales, problems. Vocabulary. gridlock, lure, aggravate, snarl, implement. A. You're going to hear a report on experts discussing the traffic problems As

发表于:2019-02-03 / 阅读(266) / 评论(0)

step by step 3000 第一册

Step by Step 3000 第1册 Unit7:Transporation(3)

Part 3. The UN Road Safety Week. Keywords. UN Road Safety Week, road accidents, young people, cause of deaths, first step, preventable. Vocabulary. bid, helmet, obstacle. A. You are going to hear a report on the UN road safety program. Listen careful

发表于:2019-02-03 / 阅读(241) / 评论(0)

step by step 3000 第一册

Step by Step 3000 第1册 Unit7:Transporation(2)

Part 2. Green Transporation Festival. Keywords. Green Transporation Festival, oil, environment, reduce, other kinds of fuels. Vocabulary. hydrogen, propane, scooter, hybrid, ethanol. A. You are going to hear a report on green transporation festival.

发表于:2019-02-03 / 阅读(319) / 评论(0)

step by step 3000 第一册

21-Concentration

发表于:2019-02-05 / 阅读(518) / 评论(0)

摘取梦想的启蒙星

National standard for trans fat labeling

BEIJING, Nov. 4 (Xinhuanet) -- The amount of trans fat and other nutritional information will be marked on the labels of prepackaged food, according to the country's first national standard for food nutrition. The labeling will take effect on Jan 1,

发表于:2019-02-08 / 阅读(343) / 评论(0)

英语新闻

乔布斯传第445期:回到未来(3)

By the next showing Ive had refined the playful model. 在下一次展示之前，艾弗又完善了这个模型。 This time Jobs, with his binary view of the world, raved that he loved it. 这一次，乔布斯带着他那不是杰作就是狗屎的评

发表于:2019-02-15 / 阅读(331) / 评论(0)

乔布斯传

听播客学英语 139 多丽丝·莱辛

Today we go on a journey. It starts in Sweden over 100 years ago; and then moves to London; and finally moves to future worlds and other planets. But we start in Sweden. Alfred Nobel spent his life finding ways to blow things up. He was born in 1833

发表于:2019-02-19 / 阅读(273) / 评论(0)

听播客学英语

外贸英语一点通第5期:外贸谈判

能言善辩 ▲ What about the price? 对价钱有何看法？ ▼ The price you provided is much higher than market price. 你们提供的价格远远高于市场价格。 ▼ The price is quite fair. We'll think it over. 价格还算公道，我们会

发表于:2019-02-27 / 阅读(372) / 评论(0)

外贸英语一点通

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